Try to debug this by splitting query: E
Try to debug this by splitting query:
Execute:
SELECT {YTD([Date].[Year].CurrentMember)} ON 0
, {[Measures].[NRT Count]} ON 1
FROM [Data Warehouse]
Do you see expected results. If no, replace YTD with PeriodsToDate and specify proper level. If PeriodsToDate works, your date dimension does not have proper "Type" property set.